Results 11 to 20 of about 31,731 (271)

Photochemical and electrochemical studies on lanthanide complexes of 6-(hydroxymethyl)pyridine- 2-carboxaldehyde[2- methyl-pyrimidine-4,6-diyl] bis-hydrazone

Revista Colombiana de Química, 2014
Herein we report the synthesis of the 6-(hydroxymethyl)pyridine-2- carboxaldehyde[2-methyl-pyrimidine- 4,6-diyl]bis-hydrazone by a condensation reaction between 6-(hydroxymethyl) picolinaldehyde with 4,6-(bis-hydrazino)-2- methylpyrimidine.
María Alejandra Fernandez, Juan Camilo Barona, Dorian Polo-Cerón, Manuel N. Chaur   +3 more
doaj   +2 more sources

Semi-empirical design and synthesis of novel 4-hydroxy-6-sulphonaphthyl azohydroxynaphthalenes with predominant hydrazone form

Scientific African
Due to their enhanced photochromic effects, hydrazone forms of tautomeric azo compounds are commercially preferred as photoreceptors and binary switches.
Olusegun E. Thomas, Olajire A. Adegoke
doaj   +2 more sources

Vinylogous Hydrazone Strategy for the Organocatalytic Alkylation of Heteroaromatic Derivatives

, 2021
A new umpolung approach for the asymmetric FriedelCrafts-type alkylation of electron-poor heteroaromatic systems has been developed. It is based on the vinylogous reactivity of hydrazones derived from heteroaromatic aldehydes.
Beata, Łukasik, Sebastian, Frankowski, Lukasz, Albrecht, Justyna, Kowalska   +3 more
core   +1 more source

Asymmetric [4+2]-cycloaddition of Anthracene Derivatives via Hydrazone Activation

, 2023
Enantio- and diastereoselective dearomative [4+2]-cycloaddition reaction between N,N-dimethylhydrazone derived from 9-anthracenecarbaldehyde and α,β-unsaturated aldehydes is reported.
Jakub, Ossowski, Łukasz, Albrecht, Beata, Łukasik, Sebastian, Frankowski   +3 more
core   +1 more source

Nickel-Catalyzed Cross-Coupling Methylation of Aryl and Heteroaryl Electrophiles via Hydrazone Umpolung

, 2023
Methyl groups play a vital role in pharmaceutical substrates, where their installation onto aryl and heteroaryl moieties can often lead to enhanced drug-target interactions.
Daliah, Farajat, Yiram, Kim, Chao-Jun, Li, Anastasiia, Afanasenko, Juan D., Lasso, Joaquín, Barroso-Flores, Durbis J., Castillo-Pazos, Léa, Philippe   +7 more
core   +1 more source

DNA Functionality with Photoswitchable Hydrazone Cytidine

, 2020
A new family of hydrazone modified cytidine phosphoramidite building block was synthesized and incorporated into DNA oligonucleotides to construct photoswitchable DNA strands.
Ya Ying, Zheng, Song, Mao, Zhihua, Chang, Jia, Sheng, Alexander, Shekhtman   +4 more
core   +1 more source

Effect of the alkyl linker length on the photoisomerization of hydrazone switches on metal surfaces

, 2022
A series of bistable hydrazone switches containing alkyl thiolate linkers of various lengths (Cn HAT, n = 3, 8, 10, and 11) were synthesized. We explore the length effect of the carbon chain on the photoisomerization of hydrazone switches using UV-vis ...
Ivan, Aprahamian, Liqing, Zheng, Renato, Zenobi, Jinggang , Lan, Sirun, Yang, Vladimir , V. Rybkin, Sven , Krähenbühl   +6 more
core   +1 more source

6-Bromo-2'-(2-chlorobenzylidene)nicotinohydrazide and 6-Bromo-2'-(3-bromo-5-chloro-2-hydroxybenzylidene)nicotinohydrazide Methanol Solvate: Synthesis, Characterization, Crystal Structures and Antimicrobial Activities

Acta Chimica Slovenica, 2021
Two newly synthesized nicotinohydrazones, 6-bromo-2'-(2-chlorobenzylidene)nicotinohydrazide (1) and 6-bromo-2'-(3-bromo-5-chloro-2-hydroxybenzylidene)nicotinohydrazide methanol solvate (2), have been obtained and structurally characterized by ...
Hai-Yun Zhu
doaj   +1 more source

Preparation and Antimicrobial Activity of s-Triazine Hydrazones of 7-Hydroxy Coumarin and Their Metal Complexes

E-Journal of Chemistry, 2009
Metal complexes of 7-hydroxy coumarin hydrazone of s-triazine derivatives derived from 7-hydroxy-8-aceto-N-(4',6’-dichloro-1',3',5'-s-triazine) coumarin hydrazone and transition metals have been synthesized and screened for their antibacterial ...
G. R. Jani, K. B. Vyas, Zudas Franco
doaj   +1 more source

[N′-(5-Bromo-2-oxidobenzylidene-κO)-2-chlorobenzohydrazidato-κ2N′,O](methanol-κO)(methanolato-κO)oxidovanadium(V)

Acta Crystallographica Section E, 2011
The VV atom in the title complex, [V(C14H8BrClN2O2)(CH3O)O(CH3OH)], is six-coordinated by one phenolate O, one imine N and one enolic O atom of the hydrazone ligand, one oxide O atom, one methanol O atom and one methoxide O atom in a distorted octahedral
Fu-Ming Wang
doaj   +1 more source